Hardness critical item
A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 5835-01-163-4215
NSN 6645-01-432-0052
NSN 6650-01-524-8171
NSN 6610-01-316-8902
NSN 6110-01-356-7976
NSN 5905-00-736-4242
NSN 6320-01-195-5583
NSN 5996-01-330-8742
NSN 5965-01-121-1214
NSN 6620-00-990-3385
NSN 5905-01-099-4954
NSN 7035-01-653-4736